Up to 40% of northeastern Asians experience flushing and elevated heart rate after drinking even minimal amounts of alcohol, due to accumulation of acetaldehyde. This is because of a mutation in acetaldehyde dehydrogenase (ALDH2), the enzyme that converts acetaldehyde to acetate.
When you use Outlook, the operating system saves your files in the \Documents and Settings\ directory for your user name. This directory saves some user-specific configurations, including the contact files used in your Outlook installation. Each Outlook file can be identified by its extension. Contacts are saved with the \.pab\ file extension.
What are file extensions. A file extension, or file name extension, is the letters immediately shown after the last period in a file name. For example, the file extension.txt has an extension of .txt. This extension allows the operating system to know what type of file it is and what program to run when you double-click on it.